Climate - Brownsville (Texas)

The climate of Brownsville is sub-tropical, with a very mild winter (but with the possibility of short cold spells) and a very hot, muggy summer.
The city is located in the southern tip of Texas, near the Mexican border, and 35 km (20 mi) away from the coast. Across the Rio Grande River lies the Mexican city of Matamoros.
We are on the 25th parallel, not far from the Tropic, and indeed the hot season is very long.
The winter, from December to February, is mild.
The sun shines quite often, although there are periods characterized by clouds, rain and wind.
There may be hot periods even in the middle of winter, with highs around 30 °C (86 °F) and more.
However, there may also be brief cold periods, with highs below 10 °C (50 °F). Very rarely, as happened on Christmas 2004, in December 2017 and in February 2021, it can even snow. In recent decades, the record is -9 °C (16 °F), recorded in December 1989.
The summer, from June to September, is very hot and sunny, with some thunderstorms. There combination of humidity and temperature makes the heat sweltering.
There can be long, very hot periods even in May and October, and sometimes in late April, while for short periods, the temperature can reach about 40 °C (104 °F) from March to September. The record is 41 °C (106 °F), recorded even at the end of March 1984, as well as at the beginning of September 2000.
From June to November (but with a higher probability from August to October), there is the risk of hurricanes. The city was hit hard by Hurricane Dolly in late July 2008.
The average temperature of the coldest month (January) is of 17.2 °C (63 °F), that of the warmest month (August) is of 30.6 °C (87 °F). Here are the average temperatures.

Precipitation amounts to 680 millimeters (26.8 inches) per year: so, it is at an intermediate level. It ranges from 25 mm (1 in) in the driest months (January, February) to 145 mm (5.7 in) in the wettest (September). Here is the average precipitation.



On average, there are around 2,710 sunshine hours per year. Here are the average sunshine hours per day.

The sea temperature ranges between 20 °C (68 °F) and 29 °C (84 °F). From January to March, the sea is very cool, while it becomes pleasantly warm for swimming from June to October. Here are the average sea temperatures.

Best Time

The best time to visit Brownsville is from November to March. Winter, from December to February, is generally a mild season, although it can sometimes get cold (especially in December and January). You can therefore choose the months of March and November.

Return to the climate of Texas.

Brownsville - Weather by month

Based on the period 1991-2020

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In January, the coldest month of the year, the weather in Brownsville is usually very mild. The average temperature is of 17.2 °C (63 °F), with a minimum of 11.7 °C (53.1 °F) and a maximum of 22.6 °C (72.7 °F).
On the coldest nights of the month, the temperature usually drops to around 2.5 °C (36.5 °F). However, it dropped to -2 °C (28.4 °F) in January 2010.
On the warmest days of the month, the temperature usually reaches around 29 °C (84 °F). However, it reached 35 °C (95 °F) in January 2017.
Precipitation amounts to 25 mm (1 in), distributed over 7 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 20.5 °C (69 °F). Therefore, the sea is cool for swimming.

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In February, the weather in Brownsville is usually warm. The average temperature is of 19.2 °C (67 °F), with a minimum of 13.8 °C (56.8 °F) and a maximum of 24.6 °C (76.3 °F).
On the coldest nights of the month, the temperature usually drops to around 4.5 °C (40 °F). However, it dropped to -2.2 °C (28 °F) in February 2011.
On the warmest days of the month, the temperature usually reaches around 30.5 °C (87 °F). However, it reached 33.9 °C (93 °F) in February 1996.
Precipitation amounts to 25 mm (1 in), distributed over 6 days.
The day lasts on average 11 hours and 20 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 20 °C (67.5 °F). Therefore, the sea is very cool for swimming.

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In March, the weather in Brownsville is usually warm. The average temperature is of 21.8 °C (71 °F), with a minimum of 16.7 °C (62.1 °F) and a maximum of 27 °C (80.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 6.5 °C (44 °F). However, it dropped to 2.2 °C (36 °F) in March 2007.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 33 °C (91.5 °F). However, it reached 38.3 °C (100.9 °F) in March 2009.
Precipitation amounts to 35 mm (1.4 in), distributed over 4 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 19 kph (12 mph).
The average sea temperature is of 20 °C (68.5 °F). Therefore, the sea is very cool for swimming.

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In April, the weather in Brownsville is usually warm to hot and muggy. The average temperature is of 24.8 °C (77 °F), with a minimum of 19.8 °C (67.6 °F) and a maximum of 29.8 °C (85.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 10.5 °C (51 °F). However, it dropped to 3.9 °C (39 °F) in April 2007.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 34.5 °C (94.5 °F). However, it reached 40 °C (104 °F) in April 2017.
Precipitation amounts to 35 mm (1.4 in), distributed over 4 days.
The day lasts on average 12 hours and 50 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 22 °C (72 °F). Therefore, the sea is cool for swimming.

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In May, the weather in Brownsville is usually very hot and muggy. The average temperature is of 27.8 °C (82 °F), with a minimum of 23.2 °C (73.8 °F) and a maximum of 32.4 °C (90.3 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 15.5 °C (60 °F). However, it dropped to 8.9 °C (48 °F) in May 1996.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 35 °C (95.5 °F). However, it reached 38.3 °C (100.9 °F) in May 1995.
Precipitation amounts to 55 mm (2.2 in), distributed over 5 days.
The day lasts on average 13 hours and 25 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 25 °C (77.5 °F). Therefore, the sea is warm enough for swimming.

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In June, the weather in Brownsville is usually very hot and muggy. The average temperature is of 29.8 °C (86 °F), with a minimum of 25.1 °C (77.2 °F) and a maximum of 34.4 °C (93.9 °F).
On the coldest nights, the temperature usually drops to around 21.5 °C (70.5 °F). However, it dropped to 18 °C (64.4 °F) in June 1997.
On the warmest days, the temperature usually reaches around 36.5 °C (97.5 °F). However, it reached 40 °C (104 °F) in June 2019.
Precipitation amounts to 75 mm (3 in), distributed over 6 days.
The day lasts on average 13 hours and 40 minutes. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 10 hours of sunshine per day. So, the sun shines 75% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 28 °C (82 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In July, the weather in Brownsville is usually very hot and muggy. The average temperature is of 30.2 °C (86 °F), with a minimum of 25.4 °C (77.7 °F) and a maximum of 35 °C (95 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (73 °F). However, it dropped to 21.7 °C (71.1 °F) in July 2001.
On the warmest days of the month, the temperature usually reaches around 36.5 °C (98 °F). However, it reached 40 °C (104 °F) in July 2003.
Precipitation amounts to 50 mm (2 in), distributed over 5 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 11 hours of sunshine per day. So, the sun shines 79% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 28.5 °C (83 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In August, the hottest month of the year, the weather in Brownsville is usually very hot and muggy. The average temperature is of 30.6 °C (87 °F), with a minimum of 25.4 °C (77.7 °F) and a maximum of 35.7 °C (96.3 °F).
On the coldest nights of the month, the temperature usually drops to around 22.5 °C (72.5 °F). However, it dropped to 20 °C (68 °F) in August 2015.
On the warmest days of the month, the temperature usually reaches around 37.5 °C (99 °F). However, it reached 40.6 °C (105.1 °F) in August 2012.
Precipitation amounts to 55 mm (2.2 in), distributed over 7 days.
The day lasts on average 13 hours and 0 minutes.
There are on average 10 hours of sunshine per day. So, the sun shines 76% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 29 °C (84 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In September, the weather in Brownsville is usually very hot and muggy. The average temperature is of 28.6 °C (83 °F), with a minimum of 23.7 °C (74.7 °F) and a maximum of 33.4 °C (92.1 °F).
On the coldest nights, the temperature usually drops to around 18 °C (64.5 °F). However, it dropped to 12.8 °C (55 °F) in September 1995.
On the warmest days, the temperature usually reaches around 36.5 °C (97.5 °F). However, it reached 41 °C (105.8 °F) in September 2000.
Precipitation amounts to 145 mm (5.7 in), distributed over 10 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 68% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).
The average sea temperature is of 29 °C (84 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In October, the weather in Brownsville is usually warm to hot and muggy. The average temperature is of 25.5 °C (78 °F), with a minimum of 20.3 °C (68.5 °F) and a maximum of 30.7 °C (87.3 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 11 °C (52 °F). However, it dropped to 1.7 °C (35.1 °F) in October 1993.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 34 °C (93.5 °F). However, it reached 38.9 °C (102 °F) in October 2013.
Precipitation amounts to 95 mm (3.7 in), distributed over 8 days.
The day lasts on average 11 hours and 30 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 64% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 14 kph (8 mph).
The average sea temperature is of 27 °C (81 °F). Therefore, the sea is pleasantly warm and allows long swims.

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In November, the weather in Brownsville is usually warm. The average temperature is of 21.4 °C (71 °F), with a minimum of 16 °C (60.8 °F) and a maximum of 26.8 °C (80.2 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 6 °C (43 °F). However, it dropped to -0.6 °C (30.9 °F) in November 1993.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 31.5 °C (88.5 °F). However, it reached 33.3 °C (91.9 °F) in November 1992.
Precipitation amounts to 45 mm (1.8 in), distributed over 6 days.
The day lasts on average 10 hours and 55 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 24.5 °C (76 °F). Therefore, the sea is warm enough for swimming.

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In December, the weather in Brownsville is usually very mild. The average temperature is of 18 °C (64 °F), with a minimum of 12.6 °C (54.7 °F) and a maximum of 23.4 °C (74.1 °F).
On the coldest nights of the month, the temperature usually drops to around 2.5 °C (36.5 °F). However, it dropped to -2.2 °C (28 °F) in December 2004.
On the warmest days of the month, the temperature usually reaches around 29.5 °C (85 °F). However, it reached 32.8 °C (91 °F) in December 2015.
Precipitation amounts to 30 mm (1.2 in), distributed over 7 days.
The day lasts on average 10 hours and 30 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 4 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 15 kph (9 mph).
The average sea temperature is of 22 °C (72 °F). Therefore, the sea is cool for swimming.